work around for windows path separator for is_path_ignored

src/repo.rs

@@ -2043,6 +2043,20 @@ impl Repository {
     }
 
     /// Test if the ignore rules apply to a given path.
+    #[cfg(windows)]
+    pub fn is_path_ignored<P: AsRef<Path>>(&self, path: P) -> Result<bool, Error> {
+        // `git_ignore_path_is_ignored` dose not work with windows path separator
+        // so we convert \ to /
+        let path = try!(::std::ffi::CString::new(path.as_ref().to_string_lossy().replace('\\', "/")));
+        let mut ignored: c_int = 0;
+        unsafe {
+            try_call!(raw::git_ignore_path_is_ignored(&mut ignored, self.raw, path));
+        }
+        Ok(ignored == 1)
+    }
+
+    /// Test if the ignore rules apply to a given path.
+    #[cfg(not(windows))]
     pub fn is_path_ignored<P: AsRef<Path>>(&self, path: P) -> Result<bool, Error> {
         let path = try!(path.as_ref().into_c_string());
         let mut ignored: c_int = 0;
@@ -2540,4 +2554,18 @@ mod tests {
         let _ = repo.clear_ignore_rules();
         assert!(!repo.is_path_ignored(Path::new("/foo")).unwrap());
     }
+
+    #[test]
+    #[cfg(windows)]
+    fn windows_is_path_ignored() {
+        let (_td, repo) = graph_repo_init();
+
+        assert!(!repo.is_path_ignored(Path::new("/foo")).unwrap());
+
+        let _ = repo.add_ignore_rule("/foo");
+        assert!(repo.is_path_ignored(Path::new("\\foo\\thing")).unwrap());
+
+        let _ = repo.clear_ignore_rules();
+        assert!(!repo.is_path_ignored(Path::new("\\foo\\thing")).unwrap());
+    }
 }